English version

Ordnance Survey map in Geography topic

From Longman Dictionary of Contemporary EnglishOrdnance Survey mapˌOrdnance ˈSurvey ˌmap noun [countable] British English 🔊 🔊 SGa map which shows all the roads, paths, hills etc of an area in detail
Examples from the Corpus
Ordnance Survey mapLorton paused to consult his Ordnance Survey map.Filling a substantial amount of skyline and covering six full squares of the Ordnance Survey map.